public class UserInstance {
private Long id;
private String accessKey;
private String accessKeySecret;
private Integer state;
public UserInstance() {
}
public Long getId() {
return id;
}
public void setId(Long id) {
this.id = id;
}
public String getAccessKey() {
return accessKey;
}
public void setAccessKey(String accessKey) {
this.accessKey = accessKey;
}
public String getAccessKeySecret() {
return accessKeySecret;
}
public void setAccessKeySecret(String accessKeySecret) {
this.accessKeySecret = accessKeySecret;
}
public Integer getState() {
return state;
}
public void setState(Integer state) {
this.state = state;
}
}
=====================================================================
import
java.util.ArrayList;
import java.util.List;
import com.google.gson.Gson;
import com.google.gson.reflect.TypeToken;
import org.junit.Test;
/**
* Created by Janesong on 2017/3/4.
*/
public class JsonGoogleTest {
@Test
public void test2() {
System.out.println("*******************将UserInstance对象集合转换成JSON***************");
ArrayList<UserInstance> arrayList = new ArrayList<UserInstance>(); // 初始化数据对象
UserInstance userInstance = null;
// 初始化arrayList容器 2个UserInstance对象
for (int i = 0; i < 2; i++) {
userInstance = new UserInstance();
userInstance.setId((123456l + i + 1));
userInstance.setAccessKey("AccessKey1234567890" + i);
userInstance.setAccessKeySecret("AccessKeySecret1234567890" + i);
userInstance.setState(1);
arrayList.add(userInstance);
}
Gson gson = new Gson(); // 创建Gson对象
String strJson = gson.toJson(arrayList); // list集合-->Json数组
System.out.println(strJson);
// 将str json格式变成 list格式
List<UserInstance> list = gson.fromJson(strJson, new TypeToken<List<UserInstance>>() {
}.getType());
// 遍历输出List集合
for (int i = 0; i < arrayList.size(); i++) {
System.out.print(" 第" + (i + 1) + "个: ");
System.out.print(" id:" + list.get(i).getId());
System.out.print(" \taccessKey:" + list.get(i).getAccessKey());
System.out.print(" \taccessKeySecret:" + list.get(i).getAccessKeySecret());
System.out.println(" \tstate:" + list.get(i).getState());
}
}
@Test
public void test() {
System.out.println("*******************将UserInstance对象转换成JSON******************");
// 封装UserInstance对象
UserInstance userInstance = new UserInstance();
userInstance.setId(123456l);
userInstance.setAccessKey("AccessKey1234567890");
userInstance.setAccessKeySecret("AccessKeySecret1234567890");
userInstance.setState(1);
Gson gson = new Gson(); // 创建gson对象
// 使用Gson对象tojson方法将 UserInstance对象转换成jsonObject
String strJson = gson.toJson(userInstance);
// 输出转换后的格式
System.out.println(strJson);
}
@Test
public void test1() {
System.out.println("********************将JSON对象转换成UserInstance对象***************");
// jsonObject数据
String strJson = "{\"id\":\"0\",\"accessKey\":\"accessKey000000\",\"accessKeySecret\":\"accessKeySecret00000\",\"state\":\"1\"}";
System.out.println(strJson);
Gson gson = new Gson(); // 创建gson对象
// 使用Gson对象fromJson方法 将 jsonObject-->UserInstance对象
UserInstance userInstance = gson.fromJson(strJson, UserInstance.class);
// 输出对象的属性
System.out.print(" id:" + userInstance.getId());
System.out.print(" \taccessKey:" + userInstance.getAccessKey());
System.out.print(" \taccessKeySecret:" + userInstance.getAccessKeySecret());
System.out.println(" \tstate:" + userInstance.getState());
}
}